/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package main

import (
	"context"
	"fmt"
	"os"
	"sync"

	"github.com/apache/rocketmq-client-go/v2"
	"github.com/apache/rocketmq-client-go/v2/primitive"
	"github.com/apache/rocketmq-client-go/v2/producer"
)

// Package main implements a async producer to send message.
func main() {
	p, _ := rocketmq.NewProducer(
		producer.WithNsResolver(primitive.NewPassthroughResolver([]string{"127.0.0.1:9876"})),
		producer.WithRetry(2),
		producer.WithNamespace("test1|InstanceTest"))

	err := p.Start()
	if err != nil {
		fmt.Printf("start producer error: %s", err.Error())
		os.Exit(1)
	}
	var wg sync.WaitGroup
	for i := 0; i < 10; i++ {
		wg.Add(1)
		err := p.SendAsync(context.Background(),
			func(ctx context.Context, result *primitive.SendResult, e error) {
				if e != nil {
					fmt.Printf("receive message error: %s\n", err)
				} else {
					fmt.Printf("send message success: result=%s\n", result.String())
				}
				wg.Done()
			}, primitive.NewMessage("topic-1", []byte("Hello RocketMQ Go Client!")))

		if err != nil {
			fmt.Printf("send message error: %s\n", err)
		}
	}
	wg.Wait()
	err = p.Shutdown()
	if err != nil {
		fmt.Printf("shutdown producer error: %s", err.Error())
	}
}

